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Bulik CM, Sullivan PF, Kendler KS.Bulik CM, et al. Among authors: sullivan pf.Biol Psychiatry. 1998 Dec 15;44(12):1210-8. doi: 10.1016/s0006-3223(98)00280-7.Biol Psychiatry. 1998.PMID: 9861464Clinical Trial.